Boring..help with a parcel please

[Dowser]

I’ve put together a parcel of tops ..weight 4kg
Height 10cms
Length 52 cms
Depth 39 cms

I think that comes in as 152 cms girth
Which I think is about £6-50 to send

Dh has just said ..what if someone gets hold of it and the tops all sink to one side..will that affect it

Here’s a photo

Meant to say that it comes in as well under the 245 cms allowed